Improvement in machines for dressing castings



-' 1' ErTEn STAT i l JOHN L. oTrs, 0E LEEDS, MASSACHUSETTS.

Specification forming part of 'Letters Patent No. 159,5 26, dated February 9, 1875; application tiled January 4, 1875.

To all whom it may concern:

Be it known that I, JOHN L. OTIs, of Leeds, in the county of Hampshire and State of Massachusetts, have invented certain new and useful Improvements in Machines for Dressing Stove-Plates and other Castings; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specication, in whichyFigure l represents the machine in perspective. Fig. 2 represents a vertical section through the same, and Fig. 3 represents a hori- .zontal section through the clamping mechanism.

My invention relates, first, to the combination of a vertically-adjustable grinding head or wheel with a laterally-adjustable table, through which the head or grinding-wheel projects when said table is pivoted at points above the top of the supporting stand or column, so as to rise or fall above or below a plane through the wheel on both of the opposite sides of said wheel, as will be explained.

My invention further relates to the combination of a rotating grinding-wheel on a vertical spindle, by which it is driven, both the wheel and spindle being supported in a gate, by which, through a lever or its mechanical substitute, said gate, spindle, and wheel can be raised or lowered at pleasure with the clamping mechanism, .by which they are held at any suitable height, as will be explained.

Io enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A is a base, stand, or column, to the top of which, and opposite sides thereof, are secured brackets or supports a, which project above the top of the stand or column A, and to the tops of which brackets the table B is pivoted, so that said table may tip or incline in two directions, and, to a certain extent, without coming in contact with the stand. Slotted arcs b are fastened to the under part of the table, through which set-screws c pass into the lower part of the brackets, respectively, by means of which the table may be held in any desired position that the special work to be done may require. Through the table B there is an opening, d, to admit of the grinding head or wheel passing through it. Within the stand or column A, and between guides '6 e therein, a gate or frame, f, is placed, and from the lower end of this gate or frame a pitman, g, extends downward, and is pivoted to a bent lever, h, which extends upward into convenient position to be grasped and operated by the attendant on the machine. heads of the gate or frame f, by suitable bear-v ing-boxes, is supported a spindle, t', having a drum or band-wheel, j, upon it, around which a belt from any rst-moving power passes, to rotate said spindle, and upon kthe top of this spindle, which projects up through the opening d in the table, is placed the grinding head or wheel C, by preference 'made of emery in the well-known way, and of a form suitable for the special work to be done. wheel is removable, so that it maybe replaced by another at anytime. Abow, k, is fastened to the guides or stand, as at Z, and extends around to the position occupied by the attendant on the machine; and a second bow, m, the feet of which press against the sliding gate f, is parallel, or nearly so, to that la, and is in near proximity to the latter, while a set or clamp screw, u, passes into or through both bows, so as to draw the one, m, tight up against the gate f, to hold it in any xed position.

By releasing the clamp-screw the operator may, by means of the lever h, raise or lower the grinding head or stone c, through the opening d in the table, to any desirable position, and then, by running up said tighteningscrew, hold the head, stone, or grinding-wheel in that position, the object being to change the grinding-surface, and so cause the grindingwheel to wear evenly and uniformly. The top ofthe stand A is beveled orr rounded off in the direction in which the table swings, so that the table maybe set at such angle or inclination in relation to the grinding-surface as the character of the Work to be done may require. A collar, o, is fastened to the spindle t', to prevent the latter and the grinding-wheel it carries from dropping too far. The table B is so hung by its pivotal connections that, when horizontal, as seen in Fig. 2, it is above the top of the stand or column A, and this admits In the cross- This head or V Y oted above the top of the supporting-stand, so that said table may be adjusted or inclined to the' right or to the left of the vertical axis of the grinding-wheel, as and for the purpose described and represented.

2. In combination with the vertically-slidin g gate or frame f, by which the grinding-Wheel is supported and raised or lowered, the clamping mechanism km n, for holding said gate or Wheel in its adjusted position, as and for the purpose described.

JOHN L. OTIS. UVitnesses:

UHAs. E. STEVENS, H. K. PARsoNs. 

